CVE-2021-20314: Buffer Overflow
First published: Thu Aug 12 2021(Updated: )
Last updated 24 July 2024
Credit: secalert@redhat.com secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Libspf2 Libspf2 | <1.2.11 | |
| Redhat Enterprise Linux | =7.0 | |
| Fedoraproject Fedora | =33 | |
| Fedoraproject Fedora | =34 | |
| Fedoraproject Fedora | =35 | |
| debian/libspf2 | 1.2.10-7.1~deb11u1 1.2.10-7.2 1.2.10-8.2 |
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Reference Links
- https://bugzilla.redhat.com/show_bug.cgi?id=1993070
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CMSFT2NJDZ7PATRZSQPAOGSE7JD6ELOB/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GFXJRHPE5OSCPTNA3ZZ4ORDHT4JQH3Y4/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Y6T4HYXXSUQCGJB2ES6X7Q74YYF7V7XU/
- https://access.redhat.com/security/cve/CVE-2021-20314
- https://seclists.org/oss-sec/2021/q3/94
- https://github.com/shevek/libspf2/commit/c37b7c13c30e225183899364b9f2efdfa85552ef
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1993072
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1993071
- https://security.gentoo.org/glsa/202401-22
- https://launchpad.net/bugs/cve/CVE-2021-20314
- https://www.openwall.com/lists/oss-security/2021/08/11/6
- https://security-tracker.debian.org/tracker/CVE-2021-20314
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-20314
- https://nvd.nist.gov/vuln/detail/CVE-2021-20314
- https://ubuntu.com/security/CVE-2021-20314
Frequently Asked Questions
What is CVE-2021-20314?
CVE-2021-20314 is a stack buffer overflow vulnerability in libspf2 versions below 1.2.11 that can lead to denial of service and potentially code execution.
What is the severity of CVE-2021-20314?
CVE-2021-20314 has a severity rating of 9.8 (Critical).
Which software versions are affected by CVE-2021-20314?
Libspf2 versions below 1.2.11, Redhat Enterprise Linux 7.0, and Fedoraproject Fedora 33, 34, and 35 are affected.
How can CVE-2021-20314 be exploited?
CVE-2021-20314 can be exploited by processing certain SPF macros in malicious crafted SPF explanation messages.
Are there any references to learn more about CVE-2021-20314?
Yes, you can find more information on CVE-2021-20314 at the following references: [Bugzilla Redhat](https://bugzilla.redhat.com/show_bug.cgi?id=1993070), [Fedoraproject Fedora 33](https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CMSFT2NJDZ7PATRZSQPAOGSE7JD6ELOB/), [Fedoraproject Fedora 34](https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GFXJRHPE5OSCPTNA3ZZ4ORDHT4JQH3Y4/).
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